---
id: CVE-2026-93903
title: >-
  LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect
  URL validation in a certain "corner case."
summary: >-
  LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect
  URL validation in a certain "corner case."
severity: critical
cvss: 9.4
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'
cwe:
  - CWE-174
vendor: litespeedtech
product: LiteSpeed Web Server
affected:
  - litespeed_web_server < 6.3.7 build 1
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T14:17:37.060'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93903'
references:
  - url: 'https://docs.litespeedtech.com/lsws/changelog/#v6-3-7-build-1'
    label: cve@mitre.org
  - url: 'https://www.litespeedtech.com/products/litespeed-web-server/release-log'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-09-30T14:05:17.363Z'
---

## Overview

LiteSpeed Web Server (LSWS) before 6.3.7 build 1 mishandles internal redirect URL validation in a certain "corner case."

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.